Fair Value Measurements - Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset derivative instruments at fair value	$ 812,664	$ 481,654
Fair Value, Measurements, Recurring | Quoted prices in active markets for identical assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset derivative instruments at fair value	95,041	112,107
Liability derivative instruments at fair value	71,107	126,582
Fair Value, Measurements, Recurring | Significant other observable inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset derivative instruments at fair value	717,623	369,547
Liability derivative instruments at fair value	241,589	209,469
Fair Value, Measurements, Recurring | Significant unobservable inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset derivative instruments at fair value	0	0
Liability derivative instruments at fair value	0	0
Fair Value, Measurements, Recurring | Estimate of Fair Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset derivative instruments at fair value	812,664	481,654
Liability derivative instruments at fair value	$ 312,696	$ 336,051